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Subject[PATCH 1/5 (take 2)] sysfs: if show/store is missing return -EIO
Date
sysfs: if attribute does not implement show or store method
read/write should return -EIO instead of 0 or -EINVAL.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---
bin.c | 4 ++--
file.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
Index: dtor/fs/sysfs/file.c
===================================================================
--- dtor.orig/fs/sysfs/file.c
+++ dtor/fs/sysfs/file.c
@@ -23,7 +23,7 @@ subsys_attr_show(struct kobject * kobj,
{
struct subsystem * s = to_subsys(kobj);
struct subsys_attribute * sattr = to_sattr(attr);
- ssize_t ret = 0;
+ ssize_t ret = -EIO;

if (sattr->show)
ret = sattr->show(s,page);
@@ -36,7 +36,7 @@ subsys_attr_store(struct kobject * kobj,
{
struct subsystem * s = to_subsys(kobj);
struct subsys_attribute * sattr = to_sattr(attr);
- ssize_t ret = 0;
+ ssize_t ret = -EIO;

if (sattr->store)
ret = sattr->store(s,page,count);
Index: dtor/fs/sysfs/bin.c
===================================================================
--- dtor.orig/fs/sysfs/bin.c
+++ dtor/fs/sysfs/bin.c
@@ -25,7 +25,7 @@ fill_read(struct dentry *dentry, char *b
struct kobject * kobj = to_kobj(dentry->d_parent);

if (!attr->read)
- return -EINVAL;
+ return -EIO;

return attr->read(kobj, buffer, off, count);
}
@@ -71,7 +71,7 @@ flush_write(struct dentry *dentry, char
struct kobject *kobj = to_kobj(dentry->d_parent);

if (!attr->write)
- return -EINVAL;
+ return -EIO;

return attr->write(kobj, buffer, offset, count);
}
-
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